docs: def get_channel_info(self):
          """ Returns a dictionary of channel information key/value pairs.
          """
          self.assert_open()
          channel_info = self.handle[self.global_key + 'channel_id'].attrs.items()
          channel_info = {key: _clean(value) for key, value in channel_info}
          channel_info['channel_number'] = int(channel_info['channel_number'])
          return channel_info